1. sudden outbreaks or worsening of a medical condition, especially a chronic illness
Usage: medical
2. sudden bursts of anger, violence, or conflict
3. sudden increases in intensity of fire or flame

Examples

• Her arthritis flareups were more frequent during cold weather.
• The patient experienced several flareups of his skin condition this month.
• Border flareups between the two countries worried international observers.
• The protest remained peaceful despite minor flareups of tension.
• Firefighters worked to contain the flareups that spread from the main blaze.
• Gas flareups from the damaged pipeline created safety concerns.
• The doctor prescribed medication to prevent future flareups.